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<title>DATABASE: Solids</title>
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<h3>Reactions with Solids:</h3>

<p>For solids, like for aqueous complexes, the <nobr>log<i>K</i>&deg;-</nobr>value
for the formation reaction is needed. Note that this is the inverse of the
<i>solubility product,</i> i.e.:  <nobr>log<i>K</i><sub>sp</sub></nobr> =
<nobr>&#8722;&nbsp;log<i>K</i><sub>f</sub></nobr></p>

<p>The state of the solid is indicated at the end of the name:
<nobr>&#147;(cr)&#148;</nobr> or <nobr>&#147;(c)&#148;</nobr> indicates crystalline;
<nobr>&#147;(am)&#148;</nobr> amorphous;
<nobr>&#147;(s)&#148;</nobr>
solid (unknown crystallinity), etc.</p>

<p>The concentration of a solid is equivalent to that of an aqueous species
(mols of solid in a litre of aqueous solution).</p>

<p><b>Examples:</b></p>

<p class="cont"><i>Precipitation:</i></p>
<p class="indent2">
<nobr>Ag<sup>+</sup></nobr> <nobr>+&nbsp;Cl<sup>&#8722;</sup></nobr>
	<img src="images/rlh.gif" alt="=" border="0" width="14" height="10">
  <nobr>AgCl(c)</nobr></p>
<p class="indent">
line in logK-file:</p>
<p class="indent2">
<nobr><tt>AgCl(c);9.75;;;Ag+;1;;;Cl-;1;;;;;;;0;cerargyrite Wateq4F</tt></nobr>
</p>
  
<p class="cont"><i>Hydrolysis:</i></p>
<p class="indent2">
<nobr>2&nbsp;Bi<sup>3+</sup></nobr> <nobr>+&nbsp;3H<sub>2</sub>O</nobr>
	<img src="images/rlh.gif" alt="=" border="0" width="14" height="10"> <nobr>Bi<sub>2</sub>O<sub>3</sub>(s)</nobr>
	<nobr>+&nbsp;6H<sup>+</sup></nobr></p>
<p class="indent">
line in logK-file:</p>
<p class="indent2">
<nobr><tt>Bi2O3(s);-6.92;;;Bi 3+;2;H+;-6;H2O;3;;;;;;;-6;76Bae/Mes</tt></nobr>
</p>

<p class="cont"><i>Redox:</i>&nbsp;&nbsp;  for example, the formation of magnetite,</p>
<p class="indent2">
<nobr>3&nbsp;Fe<sup>3+</sup></nobr>  <nobr>+&nbsp;e&#8722;</nobr>
	<nobr>+&nbsp;4&nbsp;H<sub>2</sub>O</nobr>
	<img src="images/rlh.gif" alt="=" border="0" width="14" height="10">  <nobr>8&nbsp;H<sup>+</sup></nobr>
	  <nobr>+&nbsp;Fe<sub>3</sub>O<sub>4</sub>(c)</nobr>
</p>
<p class="indent">
line in database:</p>
<p class="indent2">
<nobr><tt>Fe3O4(c);1.968;;;Fe 3+;3;H+;-8;e-;1;H2O;4;;;;;-8;90Hem</tt></nobr>
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